An unexpected error has occurred!
Error Message:Invalid value specified for function parameter. Function Name: SubString Parameter Name: Length Parameter Ordinal: 3 Parameter Type: Numeric Submitted Value: -1 ClientID: 1301218 JobID: 0 ListID: 535 BatchID: 0 SubcriberID: 0 Data Source Type: List
 
Description:An unexpected error occurred during the execution of the page.
 
line 0, column 0
Exception Info:
An error occurred when attempting to evaluate an Image function call.  See inner exception for details.

ExactTarget.OMM.FunctionExecutionException:  An error occurred when attempting to evaluate a SubString function call.  See inner exception for details.
Source:  OMMCommon